Hidden Return Of Ishtar game
 
 Enter the Museum and go to the Return Of Ishtar room. Then, quickly
 press Right, Left, Up, Down, Circle. Now a hidden version of the
 Return of Ishtar game will begin.
 
 Alternate introduction
 
 When the Namco logo scrolls past while the game is loading, hold L1 +
 R1. Now the FMV introduction sequence from the Genji and Heiki Clan
 will be displayed. 
 
  Game Shark Codez:
 
      
  Assault                                            
      
  Infinite Credits                                   
  801DC9D0 0009
      
  Infinite Lives (Both Players)                      
  801DCA3A 0005
      
  Score Modifier (Small) (Both Players)              
  801DCA30 ????
      
  Score Modifier (Large) (Both Players)              
  801DCA32 ????
      
  Infinite Time (Both Players)                       
  801DCA5A 0063
      
  Ordyne                                             
      
  Infinite Credits                                   
  800C5664 0009
      
  Infinite Lives P1                                  
  800C55C8 0005
      
  Infinite Lives P2                                  
  800C55CA 0005
      
  Score Modifier P1 (Small)                          
  800C5594 ????
      
  Score Modifier P1 (Large)                          
  800C5596 ????
      
  Score Modifier P2 (Small)                          
  800C5598 ????
      
  Score Modifier P2 (Large)                          
  800C559A ????
      
  Crystal Modifier P1 (Small)                        
  800C5908 ????
      
  Crystal Modifier P1 (Large)                        
  800C590A ????
      
  Crystal Modifier P2 (Small)                        
  800C590C ????
      
  Crystal Modifier P2 (Large)                        
  800C590E ????
      
  Infinite Current Weapon Power P1                   
  800D2394 1568
      
  No Current Weapon Power P1                         
  800D2394 0000
      
  Infinite Current Weapon Power P2                   
  800D2396 1568
      
  No Current Weapon Power P2                         
  800D3296 0000
      
  Weapon Modifier P1                                 
  800D2090 00??
      
  Weapon Modifier P2                                 
  800D2092 00??
      
  Invincibility P1 (Flashes-Cant Pause)              
  800CD278 0096
      
  Invincibility P2 (Flashes-Cant Pause)              
  800CD27A 0096
      
  Infinite Time in Weapon Shops                      
  800F9188 0500
      
  Pac-Land                                           
      
  Infinite Credits                                   
  80057F46 0009
      
  Infinite Lives (Both Players)                      
  30058055 0005
      
  Infinite Time (Both Players)                       
  800580BC 0909
      
  Score Modifier (Small) (Both Players)              
  8005804C ????
      
  Score Modifier (Large) (Both Players)              
  8005804E ????
      
  The Return of Ishtar                               
      
  Infinite Credits                                   
  8015A7B8 0009
      
  Infinite Guys                                      
  8015A3C0 000F
      
  Max Guys                                           
  8015A410 00??
      
  The Genji And The Heike Clans                      
      
  Infinite Credits                                   
  800A05EC 0009
      
  Infinite Energy (Both Players)                     
  300A01B0 0032
      
  Infinite Money (Both Players)                      
  300A01C1 0063
      
  Infinite Sword (Both Players)                      
  300A01C9 0063
      
  Score Modifier (Both Players)                      
  800A0624 ????
      
  Quantity Digits to Accompany Weapon Modifier Codes 
      
  00 - Normal                                        
  01 - Rapid Fire                                    
  02 - Flame Gun                                     
  03 - 3-Way Shot                                    
  04 - Green Slime